Costco is suing the Trump administration over its tariffs, arguing that the White House has exceeded its executive authority in instituting tariffs and that it should be entitled to a refund if the tariffs are found unconstitutional.

In a lawsuit filed to the Court of International Trade last Friday, the retail giant argued the Trump administration has misused the federal law, the International Emergency Economic Powers Act (IEEPA), it cited to impose the tariffs.

“IEEPA grants the president certain power, but they ‘may only be exercised to deal with an unusual and extraordinary threat with respect to which a national emergency has been declared for purposes of this chapter and may not be exercised for any other purposes’,” Costco said in the lawsuit, quoting the law. The largest war

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